Tebeitoey



no Model.)

L. 0. LANDER.

JACK.

No. 391,165. Patented Oct. 16, 1888.

WITNESSES: v l/VI/EIVTOR.

ATTORNEY,

N. PETERS. "Mo-Mr. Wahin lolv. 0.0.

UNITED STATES PATENT OFFICE.

LEROY O. LANDER, OF TACOMA, \VASHINGTON TERRITORY.

JACK.

SPECIFICATION forming part of Letters Patent No. 391,165, dated October 16, 1888.

(No model.)

To all whom it may concern:

Be it known that I, LEROY O. LANDER,'of Tacoma, in the county of Pierce and Teri-L tory of Washington, have invented a new and Improved Jack, of which the following is a full, clear, and exact description.

The object of the invention is to provide a jack of simple construction specially designed for use in logging, and by means of which a hold or purchase may be obtained on the log where but limited space is available for the jack, which is often the case in operating on logs in the holds of marine vessels.

The invention consists in the peculiar construction and combination of parts hereinafi ter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of ajack embodying my improvement. Fig. 2 is a central vertical section. Fig. 3 is atop view of the head of the lifting-bar; and Fig. 4 is a crosssect-ion on line m 00, Fig. 1.

The body or stock A of thejack is formed with a concaved base or end, A, and with a guide groove, a, for the lifting orjaek bar 13, which is held to the body A by the strap or casing O, which strap is bolted or otherwise secured to the body A, bolts 0 c a being employed for this purpose in the present instance. The bolt 0' is also preferably caused to secure to the strap 0 the links D D, that carry the operatinglever E of the jack, abolt, d, serving to connect the said links and lever, which bolt works in guide slots 0 formed in the strap or casing O. The too 6 of the operating-lever E engages the teeth I) of the lifting-bar B in operating the latter.

The spring-dog which engages and holds the lifting-bar consists of an arm or lever, G, which is pivoted to the outer face of the casing O at one side thereof, and a spring, H, secured to the said arm G and bearing against one of the bolts 0 or other projection, the spring acting to normally maintain the inwardly-projecting stud or pin 9 of the dog in engagement with one of the teeth of the lifting-bar B.

The foot I) of the lifting-bar B is pivoted to the said bar, so that the foot may be swung or turned at any angle to the longitudinal axis of the bar, whereby the foot may be made to engage the end of the log from either side or from the front of the jack instead of it being necessary to change the position of the jack; and this feature 1 have found of great value in working on legs in the holds of ships, where only a limited room is often available for the jack. The head I)" of the lifting-bar is secured thereto by a stud or rivet, b, or otherwise, and flares outward from near the center to afford a firm seat therefor against the side of a log. The concaved base or end A of the body A also enables thejack to firmly seat itself against a log or other object wit-h greater surety than if it were flat.

The arrangement of the operatin -lever and links, the connectingbolt thereof working in the guide-slot, as shown, allows of the ready engagement and disengagement of the operating-lever and ratcheted lifting-bar.

Having thus described my invention,I claim as new and desire to secure by Letters Patent- 1. In a lifting-jack, the combination, with a body having curved guide-slots in its sides,aud a ratcheted lifting-bar, of links pivoted to the body, and an operating-lever having a toe engaging the lifting-bar and pivoted to the links, the pivot passing through the guideslot of the casing, substantially as described.

2. The combination,with the body A, of the ratcheted jack-bar B, a strap or casing, O, by which the said bar is held to the body, links D D, pivoted to the casing O and carrying the operatingdever E by means of a bolt, d, the said bolt being guided in slots 0 in the easing C, and a spring-dog engaging the lift-ingbar, substantially as shown and described.

LEROY O. LANDER.

Witnesses:

ERNST HoFFA, JAMES WIckERsHEIM. 

